//赋值运算符  = 
var a = 2;
//a++; //原来基础之上加1
//a = a+2;
//扩展赋值运算符 += -= *= /= %=
//a += 2; 
//a--;
//a = a-1;
//a -= 1;
//在原来的基础之上*3
//a = a*3;
//a *= 3;
//a = a/4;
//a /= 4;
var b = 10;
//b = b % 3;
b %= 3;
console.log(b);











